Since the upgrade to a 3.8 snapshot the static analyzer tools (scan-build, ccc-analyzer, etc...) are not installed any more. A search in the git archives in the distfiles directory shows that these scripts are still present upstream, so I suppose the issue is in the port.
It looks like I failed to copy the bits of the clang makefile that installed the static analyzer tools over the the llvm-devel port (now that it does all the work). I'll try to get this fixed up, but likely it will be a few weeks unless someone sends me a patch.
I fixed this a while ago.